diff --git a/.travis.yml b/.travis.yml
index ad487fa..258a19b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,25 +10,29 @@ env:
     - RACKET_DIR=~/racket
   matrix:
     - RACKET_VERSION=6.0
-    - RACKET_VERSION=6.1
-    - RACKET_VERSION=6.2
+#    - RACKET_VERSION=6.1
+#    - RACKET_VERSION=6.2
     - RACKET_VERSION=6.3
-    - RACKET_VERSION=6.4
-    - RACKET_VERSION=6.5
+#    - RACKET_VERSION=6.4
+#    - RACKET_VERSION=6.5
     - RACKET_VERSION=6.6
-    - RACKET_VERSION=6.7
-    - RACKET_VERSION=6.8
+#    - RACKET_VERSION=6.7
+#    - RACKET_VERSION=6.8
     - RACKET_VERSION=6.9
-    - RACKET_VERSION=6.10
-    - RACKET_VERSION=6.11
+#    - RACKET_VERSION=6.10
+#    - RACKET_VERSION=6.11
     - RACKET_VERSION=6.12
+    - RACKET_VERSION=7.0
+    - RACKET_VERSION=7.1
     - RACKET_VERSION=HEAD
+    - RACKET_VERSION=HEADCS
 
 # You may want to test against certain versions of Racket, without
 # having them count against the overall success/failure.
 matrix:
   allow_failures:
   #  - env: RACKET_VERSION=HEAD
+  - env: RACKET_VERSION=HEADCS
   # Fast finish: Overall build result is determined as soon as any of
   # its rows have failed, or, all of its rows that aren't allowed to
   # fail have succeeded.